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Looks like we are getting a little bit off the subject I was only asking about the gold plating on pc boards I was not referring to jewelery or any other gold I found another good link that explains the type of plating and it's many uses http://en.wikipedia.org/wiki/Gold_plating

That's not my intent. That is the instruction according to the IPC 610 standard and the instructor I understand your point and I have not removed any gold from any pc bd I was just trained on the IPC 610 so I was just curious about the process in theory only not in reality.

I agree but we can't do anything about it just follow the rules like a bunch of lemmings

I totally agree with the waste of money but I guess when you work for NASA price is not a factor Where do you think those $700 hammers come from ? Actually we did receive a small quantity of bds (not for NASA) that were plated with gold by accident and we ended up using it as is just...

The objective is not to extract gold but to remove the gold from the plated surface where something is going to be soldered to This would be from at least 95% of surface to be soldered to I did ask the trainer but he did not have an answer at the time and he said that he will get back to me and...

I read that article before but it's hard to determine how much gold is there It's also hard to tell which shade of gray is the gold If that was a copper trace that was plated with gold does all of the gold come of or gets mixed with the solder in one application ? If only a small microscopic...

Thanks for the explanation I am starting to understand the process a little bit better now So just to make sure I understand If gold is heated by itself to 750F nothing happens but when solder is added then some of the gold is mixed with the solder at the microscopic level? This gold that is...

That was interesting to read but it all seem to be at a microscopic level What do you think of this statement that I read somewhere ? "Gold readily dissolves in molten solder" Is that true ? Assuming I have a bar of gold (I don't)and I place it in a solder pot at let's say 750F Would the gold...

I am just going by macgyvers2000's post that seems to be contradictory to your post He is saying that the copper traces are plated with pure gold and follows that up with a statement that implies that gold alloys do not necessarily melt at lower temperatures Of course he did not mention...

Sorry I am confused again So the pure gold is plated over the copper so far it's clear "There is a slight mixing of gold into the solder during the soldering process" That's what I am curious about If the pure gold melting temperature is much higher than the melted solder how does the solder...

Hello, Ok It's working today From what I understand when gold is mixed with other metals it forms an alloy that has a lower melting point than pure gold Should I assume that the gold plating on pc boards is not pure gold ? How do I know what gold alloy is used on pc boards ?

Hello, Thanks for the reply but that link says no document found. Is there another link that has the information ?

Hello, The basic question was answered in another closed thread but I just wanted to find out a little more detail about it How exactly and why is solder used to remove the gold plating ? What I mean is that since gold melts at much higher temperature than solder than why would the solder...